SYaoJun opened a new issue, #777:
URL: https://github.com/apache/geaflow/issues/777
**Describe the bug**
The `geaflow-dsl-connector-elasticsearch` module fails to compile under Java
8 with the following error:
```
bad class file:
lucene-core-9.8.0.jar(org/apache/lucene/util/Accountable.class)
class file has wrong version 55.0, should be 52.0
```
ref:
https://github.com/apache/geaflow/actions/runs/22855488809/job/66396165910?pr=763
Two PRs introduced a conflict:
PR #653 added the Elasticsearch connector, which transitively depends on
lucene-core:8.x (Java 8 compatible) via
elasticsearch-rest-high-level-client:7.17.10
PR #637 added the vector store module and declared lucene-core:9.8.0 in the
parent pom's <dependencyManagement>. Since dependencyManagement applies
globally across all modules, this forced the ES connector's transitive
lucene-core to be upgraded to 9.8.0, which is compiled with Java 11 (class
version 55.0) and is incompatible with the Java 8 build target.
**fix**
In pom.xml, exclude lucene-core from the ES client dependency and explicitly
re-declare lucene-core:8.11.1 to pin the Java 8 compatible version.
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